If you drive sensibly to start with, ECO PRO may not show any fuel saving.

That is exactly how I see it, those who show the greatest gains will be changing driving habits with Eco Pro mode, compared to their normal driving.

It is how guys were getting over 60mpg from 1.9 - 2.0 litre diesels over 15 years ago, without any Eco modes, just light driving, cutting down energy demands. BMW are helping more drivers see what is possible, that can only be a good thing, if it shows what can be achieved if we drive moderately.